Clean up various separators (,-x;:/) from manual input into common comma,
and allow dot for possible future fractions in large numbers:
UPDATE word SET image = jsonb_set(image, '{crop32}',
regexp_replace(image->>'crop32', '[^0-9,]', ',', 'g')
) WHERE image->>'crop32' IS NOT NULL;
Decided against dividing by 1000 to simplify code, but this would do that:
UPDATE word SET image = jsonb_set(image, '{crop32}',
to_jsonb(array_to_string(array(
SELECT unnest(string_to_array(image->>'crop32', ','))::float / 1000
), ','))
) WHERE image->>'crop32' IS NOT NULL;